Single-Atom Alloy Pd-Ag Catalyst for Selective Hydrogenation of Acrolein

Payoli Aich, Haojuan Wei, Bridget Basan, A. Jeremy Kropf, Neil M. Schweitzer, Christopher L. Marshall, Jeffrey T. Miller, Randall Meyer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Pd-Ag alloy catalysts with very dilute amounts of Pd were synthesized. EXAFS results demonstrated that when the concentration of Pd was as low as 0.01 wt %, Pd was completely dispersed as isolated single atoms in Ag nanoparticles. The activity for the hydrogenation of acrolein was improved by the presence of these isolated Pd atoms due to the creation of sites with lower activation energy for H2 dissociation. In addition, for the same particle size, the 0.01% Pd/8% Ag alloy nanoparticles exhibited higher selectivity than their monometallic counterparts, suggesting that the Pd atom may act as a site for the favorable bonding of the acrolein molecule for facile hydrogenation of the aldehyde functionality.

Original languageEnglish (US)
Pages (from-to)18140-18148
Number of pages9
JournalJournal of Physical Chemistry C
Volume119
Issue number32
DOIs
StatePublished - Jun 14 2015

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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